All participants enrolled to the study will be allocated to one of two arms. Patients of the experimental morning-only regimen arm will prepare and take MOVIPREP® solution in the full dose - 2 litres of MOVIPREP® preparation in the early morning on the day of the colonoscopy clinical procedure. Participants in the standard split-dose regimen arm will prepare and take MOVIPREP® solution in split doses - ½ of dose (1 litre) the evening before + ½ of dose (1 litre) of MOVIPREP® preparation in the morning of the day of the colonoscopy.